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MELSEC-
A
5 PRELIMINARY INFORMATION
(2) When using RISEND command
This is used to write to a R2-designated buffer memory with executing
handshake automatically between the master station and R2.
When using the RISEND command, the master station buffer memory will be
used as the transmission buffer for the control data and write data.
The complete status will be stored in the reception buffer.
(Example) Writing and transmitting 2-word transmission data to master station
R2
R2 200
H
0
H
to 1FF
H
M
R2 201
H
Programmable controller CPU
Master module
(Transmission buffer)
Refer to control data (a)
Address
1000
H
to 11FF
H
M
of Q/QnA Series
of A Series bank 1
One word
each
Write data
(Reception buffer)
Complete status
Station No., request code
Address
Q/QnA Series A Series
Bank 1
+
1200
H
M
200
H
M
Bank 1
+
1201
H
M
201
H
M
Reception data size
Transmission data size
Transmission data 1
Transmission data 1
Transmission data 2
Transmission data 2
Refer to interlock signal (b)
R2 202
H
RISEND command
execution
Writing to
buffer memory
RISEND command
execution complete
At transmission
normal completion
At transmission
error completion
Transmission request
signal (RYn0)
Transmission normal
complete signal (RXn0)
Transmission error
complete signal (RXn1)
Address
Trans-
mission
area